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Bill short, strong, conic, base trigonal, sides compressed, culmin elevated, upper mandible towards the tip deflexed and notched, under mandible shorter and straight, the base thick, the margins of both inflexed.

Bill elongated, thick, hollow, deflexed, the margins obtusely crenated, with excrescences of various forms placed on the upper mandible.

Not stoloniferous; culms rather stout, geniculate below; leaves mostly flat, short; ligule short; lower branches of the panicle in fours or fives, usually more or less naked at base, soon spreading and at length deflexed; spikelets 2–3´´ long, 3–6-flowered; flowering glume truncate-obtuse, ½–1´´ long.

Stems procumbent, somewhat pinnately branched, ¾–1´ long; leaves whitish-green, round-ovate, cellular-crenulate, deflexed; lower lobe flat, oblong-quadrate; underleaves round-quadrate; monœcious; involucral leaves larger than those of the stem, the perianth round-obovate, 2–3-carinate dorsally, 1-carinate ventrally, the keels rough.

Perigynium greenish, linear-lanceolate or almost needle shaped, not inflated, strongly deflexed at maturity, several times longer than the inconspicuous scale; spike androgynous, the pistillate flowers at base, few.—Sp.